Interior designer and developer Windsor Smith spent four years building the 13,000-square-foot property in Brentwood

A Los Angeles developer who has sold recent projects to Gwyneth Paltrow and Chris Martin is listing a newly built spec house for $33 million.

Windsor Smith, an interior designer and developer, said she spent four years designing and building the Neo-classical-style, white-brick home. Located in the affluent Brentwood neighborhood, the property spans about 13,000 square feet and includes a main house with six bedrooms and a separate guest pavilion with a screening room, a sauna and an entertainment room with a bar and walls...